bulkley



0. S. BUOKLEY. ELEGTROMAGNETIG ANNUNGIATOR FOR HOTELS, &c.

No. 7,739. Patented Oct. 29, 1850.

x M W WWW M -wa UNITED STATES PATENT OFFICE.

CHAS. S. BULKLEY, OF MACON, GEORGIA.

Specification forming part of Letters Patent No. 7,739, dated October 29, 1850.

To all whom 'it may concern:

Be it known that I, CHARLES S. BULKLEY, of Macon, in the county ofBibb and State of Georgia, have invented a new and Improved Electro ll'iagnetic Anuunciator for Hotels, 850; and I do hereby declare that the following is a full and exact description thereof, reference being ha d to the accompanying drawings, making a part of this specification, in which-- Figure l is a perspective view, showing the manner of constructing my electromagnetic annunciator and the ma'nner in which it serves to bring a room in a hotel into communication with the otlice ofthe same. Fig. 2 is a front elevation of the annnnciator, and Fig. 3 a vertical section through the same.

Similar letters indicate like parts in all the figures.

Uis a box to be located in the ofiice of a hotel,in which are placed the slides or signalplates B B, that are in communication with each room in the building and are numbered to correspond with the same. A glass plate is placed in the front of the case U, and immediately in the rear of this glass plate there is a thin casing having a series of openings formed in it in a vertical line with each other. The width of the signal-plates B B corresponds with the width of the openings in the face of the annunciator and work up and down in vertical grooves or ways. Flanges c 0 project rearward from the'upper and lower ends of the signal-plates B,which flanges have holesformed in them near their centers. A vertical rod, 1', passes down through the holes in the flanges of each vertical series of sliding plates, which rod rises above the top of the annunciator-case and is connected to a bell-crank, E. Stops t t are placed upon the rods 2' 71, below each of the signal-plates B, by means of which, when a rod is elevated, any one (or all 'the plates) connected with it will be elevated in its guides until it is caught by a catch on the springplate f, and retained in an elevated position while the rod is caused to descend by the action of the spring H on the series of bell-cranks which are connected together by the bars F F. When a signal-plate, B, is detached from the catch on the springplate fit drops down by force of its gravity until it is caught by a stop, t, on its rod 2, in which position the number upon the plate will be presented to view at the opening in the front of the annunciator-case.

A series ot'shelves, h h, are placed in the annnnciator-case in the rear of the signal-plates B B, which shelves correspond in number with the number of signahplates in one of the series placed upon one of the rods 11. On each ofthese shelves h h an electro-magnet, g. is placed immediately in the rear of each signal-plate B. Under each electro-magnet 9 one end of a curved spring-plate, f, is secured, which plate rises in front of the electro-magnet, and has an armature, a, secured to its rear side opposite the poles of the magnet. On the front side of each springplate f a catch is secured, which is beveled on its under side, so that when a signal-plate, B, is elevated the flange 0 at its upper end will glide over the beveled side of the catch and be caught and retained by the abrupt shoulder .on its upper side. When a current of electricityis passed through the coils of one of the electro-magnets y it becomes a magnet and will attract the armature e in front of it, which attraction will draw back the plate f and detach its catch from the signal-plate B, causing it to descend and show its number at the opening in the face of the annunciator.

A isa large electromagnet placed upon the. top of the annunciator-case, and S is a signalbell placed immediately over it. The arm attire 'wof this electro-magnet is placed upon the spring-plate D, secured to one side of the an nunciator-case, and just above the armature w there is secured to the spring-plate D a hammer, t, which is made to strike against the bell S whenever the clectro-magnet A is charged. A wire, 70, is connected with one of the poles of the large electro-magnet A, and after being brought into communication with a galvanic battery, 0, is conducted throughout a building and connected with insulated points q, located within the walls of every room that is desired to communicate with by means of the annunciator. The wire of eachelectro-Inagnet g is connected with the wire Z, leading to the large electro-magnet A, that is connected with the wire 70, which passes to the insulated point q, located in the wall of one of the rooms of the building. A wire, a, passes from the shank of the knob 10 to the opposite side of its respect ive magnet g in the annunciator. By pressing the knob inward the inner end of its shank,

will strike against the point q, thereby closing an electric circuit through one of the magnets g and large magnet a. The shank of the knob 21 is retained in its place within the wall by the nut r working upon a screw cut on its periphery. A helical spring'incloses the shank of the knob, andforcesit outward theinstantthat pressureis removed therefrom The wire from the opposite side of the large electro-magnet A from that which is in'connection with the wire 70 is connected with each of the small electromagnets g gby means of the wire l, as shown in Fig. 1. It will therefore be perceived that when the knob 19 in any one of the rooms of a hotel is pressed inward, so as to bring 'its shank in contact with one of the insulated points q, and thereby in connection with the wire 70, that an electric circuit can be formed embracing the large electro-magnet A and the small electromagnet g, that is connected to the particular knob 10 operated upon, which will charge the said two electro-magnets, and thereby cause the poles of the larger one, A, to attract the armature w and cause the hammer t to strike the bell S and cause the poles of the smaller electro-magnet g to attract the armature e in the rear of the signal-plate'B that bears a number corresponding to the number of the room in which the knob acted upon is located, and thereby withdraw the catch on the springplate J" from its hold on the signal-plate B and permit it to descend and bring the number upon its face opposite the opening in the face of the annunciator-case.

The handle G is connected with all the bellcranks E E and the rods 1? i, so that by drawing upon it any one or all the signal-plates B B can be elevated out of sight, where they are caught and retained by the catches on the spring-platesf f, as above'described.

It will readily be perceived that the breakage of wires and liability to derangement that causes very great expense and trouble in other hotel -annunciators will be almost entirely avoided in mine.

What I claim as my invention, and desire to secure by Letters Patent, is-

In myimproved electromagnetic annunciator for hotels, 850., the manner in which the signal-bell and any one of the signal-plates can be simultaneously acted upon at a distance from the annunciator through the medium of the galvanic battery 0, the series of electromagnets A and g g, and the wires k l n a, connected with each other and with the insulated point q and the shank of the knob 1), located within the walls of the different rooms, and with the bell S, and signal-plates B B of the insulator, substantially in the manner herein set forth.

The above specification of my improved electromagnetic ann-unciator signed and'witnessed this 11th day of July, 1850.

CHAS. S. BULKLEY.

Witnesses Z..(l. ROBBINS, H. H. YOUNG. 

